Accession Number : ADA330124

Title :   Simulating Variations in Night Sky Irradiance Via CRT Projector Controls

Descriptive Note : Interim rept. Jun 96-Jan 97

Corporate Author : NAVAL AIR WARFARE CENTER TRAINING SYSTEMS DIV ORLANDO FL

Personal Author(s) : Allen, John H. ; Hebb, Richard C.

PDF Url : ADA330124

Report Date : 18 JUL 1997

Pagination or Media Count : 33

Abstract : Availability of spectrally correct simultaneous near-IR and visual imagery in night mission capable simulators would improve night vision goggle (NVG) training fidelity. While providing the aided, through-the-goggle view, it can also provide unaided peripheral and under-the-goggle views of the simulated nighttime scene. Within certain constraints, a properly modified CRT projection display can furnish both. In addition, computer automated or manual adjustment of projector contrast and brightness controls could also effectively simulate a range of moon phase and time-of-night conditions. After gamma mapping an off-the-shelf CRT projector for various combinations of brightness and contrast control settings, the gamma corrected display imagery was used to stimulate an ANVIS. Together, the contrast and brightness controls were used to reduce or increase the projector output to simulate changing nighttime conditions. This report discusses some of the issues, practical constraints and findings of the research investigation.

Descriptors :   *NIGHT VISION DEVICES, *GOGGLES, OUTPUT, SIMULATION, SETTING(ADJUSTING), CONTRAST, COMPUTERS, OFF THE SHELF EQUIPMENT, OPTICAL IMAGES, DISPLAY SYSTEMS, PHASE, BRIGHTNESS, RADIANCE, GAMMA RAYS, MANUAL OPERATION, MAPPING, SYNCHRONISM, NEAR INFRARED RADIATION, CATHODE RAY TUBES, CATHODE RAY TUBE SCREENS, MOON, NIGHT SKY.

Subject Categories : Optical Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE